Armchair



FIG. 1 is a rear elevational view of an armchair, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a perspective view thereof, from the left rear and above. 

The ornamental design for an armchair, as shown and described. 